Cooling device for piston-rods



(No Model.)

W. B. MERRIMAN. COOLING DEVICE FOR PISTON RODS.

No. 269,695. Patented Dec.Z6,188Z.

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NITED STATES "FFICE.

ATENT COOLING DEVICE FOR PlSTON RODS.

SPECIFICATION forming part of Letters Patent No. 269,695, dated December 26, 1882.

' Application filed OctoberJLlcSz. N0 model.)

To all whom it may concern:

Be it known that 1, WM. B. MERRIMAN, of Glenfield, in the county ofAllegheny and State of Pennsylvania, have invented certain new and useful Improvements in Cooling Devices for Piston-Rods; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification, in which- Figure 1 is a longitudinal section of a steamcylinder and packing-box with my improvements attached. Fig. 2 is a cross-section through the piston-rod and gland.

This invention has relation to means for cooling piston-rods of steam-cylinders; and it consists in a novel form of apparatus, whereby a stream ot' water is caused to circulate around and in contact with the piston-rod, keeping the same cool and preventing it from warping or bending or burning out the packing.

Heretolore it has been customary to keep the piston-rods of horizontal steam-cylinders cool by allowing a stream of water to flow upon them from the mouth of a water pipe or As the piston-rodstrequently become heated up to 200 or 300, the water coming in contact with but one side of the samecauses it to warp or bend up. This bending of the piston-rod results in its binding against the stufting-box and gland on one side, and, by reason of the rod being cooled only on one side, in burning out the packing, thus necessitating frequent repairs of the box and replacement of the packing. According to my inven tion the water is caused to flow in a steady stream through a groove in a collar surrounding the rod, whereby the said rod is kept equally cool on all sides and danger of Warping of the rod or burning out of the packing avoided.

Referring to the accompanying drawings, A represents a steam-cylinder of the ordinary form. B is the head, and O the usual stuffing-box surrounding the piston-rod openin 0 is the piston-rod, and D the gland secured to the head B by bolts a a running through the, rim of said gland. b isa projecting sleeve on the inside of gland D, within which fits a packing, e, being interposed between the gland and the portion 0 of the collar. A sleeve, f, projects out from the other side ofcollar (I, so as to hold the usual packing, g, in position between said collar and the stutfing-box 0. On the inside of the collar (1, and running entirely around the same, is a groove, h, into which open water-ways a t", communicating respectively by means of suitable elastic tubing with appropriate supply and waste pipes.

The supply and waste pipes are shown as being connected to the sleeve 1) of the gland with the water ways running through the sleeve; butthe water-ways '5 i may run diagonally out from the groove to the outside of the collar, if desired.

The operation of my invention is as follows: The supply-pipe being connected to the feeding apparatus of the boiler or to other suitable watersupply, a stream, of water flows in through opening 2, around the piston-rod, through groove h, and thence out through opening '17 to the waste-pipe. The packing on both sides of the collar d prevents the escape of the water from the groove, and hence the usual slop of water in the vicinity of the steamcylinder is avoided. As the water comes in contact with the piston-rod on all sides, a perfect cooling of the entire surface of said rod is insured, and all danger of warping or cracking consequent upon unequal cooling 0tits surface avoided.

The collar through which the water runs being connected to the feeding apparatus by flexible tubing, the gland may be moved out along the piston-rod without uncoupling the supply or waste pipes, when it is desired to replace the packing.

Having described my invention, I claim 1. In combination with gland D, stuffingbox 0, and packing g, the collar d, having an internal groove and suitable supply and waste pipes communicating with said groove, sul stantially as described. I i 2. In combination with gland D, having sleeve b, the collar d, having a projecting portion, 0, fitting within said sleeve, groove h, and supply and waste pipesi t, communicating with said groove, substantially as described.

projecting portion, a, of a collar, (1, a suitable 3. In combination with the removable gland D, the collar (7, attached thereto and provided with the groove h. said collar having communication by a flexible supply-pipe with a suitable feeding apparatus, substantially as described.

In testimony tlmbl claim the foregoing as my own I have hereto affixed my signature in pres ence of two witnesses.

M. B. ME RRIMAN.

\Vitnesses:

D. ErDAVIS, Jos. B. GONNOLLY. 

